Final answer:
To convert milliliters to teaspoons, divide the number of milliliters by the conversion factor of approximately 5, as 1 teaspoon is nearly equal to 4.93 milliliters.
Step-by-step explanation:
When converting cc (ml) to tsp. or tbs., you should refer to the standard conversion factor. As given from the LibreTexts reference, 1 teaspoon is approximately 4.93 milliliters. Since this is almost equal to 5, the correct option for converting milliliters to teaspoons would be to divide by 5 (Option A).
Here is another example to help understand the process: If you have 20 milliliters and want to convert it to teaspoons, you would divide 20 ml by 5, which would give you 4 teaspoons. This method applies to conversions where you go from a smaller unit of measure to a larger one, which necessitates division by the conversion factor.